grrrr... I took my new suspension system to the local park and set it up. The webbing just goes zling sliding right through the rings even if I tie a half hitch. Is there a way of wrapping the rings that gives a greater grip? I know how to tie two half-hitches and the taut-line but they seem to zip right along. I didn't land on the backside but only because it didn't take all my weight to slip them babies down. I am using Olefin webbing if that makes a difference. I looked it up and it appears to be related to the polyester webbing and in fact seems to be listed with it on websites so I thought I should be ok. Any ideas?